audio_processing: Adds two UMA histograms logging delay jumps in AEC

webrtc/modules/audio_processing/audio_processing_impl.h

Index: webrtc/modules/audio_processing/audio_processing_impl.h
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.h b/webrtc/modules/audio_processing/audio_processing_impl.h
index 6f237ae4dc84df14917777fdefd6041106875d65..bbd17191585037e9fa739a1390f5013023a4ba8e 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.h
+++ b/webrtc/modules/audio_processing/audio_processing_impl.h
@@ -134,6 +134,7 @@ class AudioProcessingImpl : public AudioProcessing {
   int StartDebugRecording(FILE* handle) override;
   int StartDebugRecordingForPlatformFile(rtc::PlatformFile handle) override;
   int StopDebugRecording() override;
+  void UpdateHistogramsOnCallEnd() override;
   EchoCancellation* echo_cancellation() const override;
   EchoControlMobile* echo_control_mobile() const override;
   GainControl* gain_control() const override;
@@ -210,6 +211,8 @@ class AudioProcessingImpl : public AudioProcessing {
   bool was_stream_delay_set_;
   int last_stream_delay_ms_;
   int last_aec_system_delay_ms_;
+  int stream_delay_jumps_;
+  int aec_system_delay_jumps_;
 
   bool output_will_be_muted_ GUARDED_BY(crit_);